Question

please friends help me in this question
. Explain why 7x 11 x 13 + 13 and 7 x6x5 x 4 x 3 x 2 x 1 +5 are composite numbers.

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Answer 1

u can get common no in both composite no.....

7×11×13+13and 7×6×5×4×3×2×1+5

13(7×11+1) and 5 (7×6×4×3×2×1+1)

now u can solve it